.mainCanvas {
   background-color: #000;
   border: solid 1px #FF0000;
}
 
.body {
   background: #000;
   overflow-y: hidden;
   overflow-x: hidden;
   margin: 0px;
   padding: 0px;
   valign: center;
   align: center;
}
 
.contentHolder {
   width: 100%;
   height: 100%;
   margin: 0px auto;
}